Analysis of the Causes of Insulator Flashover Accidents and Their Countermeasures

2025-11-18 10:05:19

Insulator flashover accidents typically occur during rainy weather or in humid environments, mainly due to electrical breakdown caused by surface contamination and moisture on the insulator. First, contamination layers reduce the insulating capability of the insulator surface, making it easier for current to penetrate. In addition, humid conditions and accumulated moisture provide a good conductive path for electric arcs, thus triggering flashover.

To address this issue, preventive measures include regularly cleaning and inspecting the insulator surface to ensure it remains dry and clean. Meanwhile, sealing devices should be installed to prevent moisture intrusion, and higher-quality materials with improved contamination resistance should be considered during the design stage. Furthermore, periodic testing of the insulator’s electrical performance can help identify and address potential risks in time, effectively reducing the occurrence of flashover accidents.